I'm using a clip on pony tail that is covering a styrafoam ball that is attached to a belt that will be worn under the skirt I'm making. Also to play on Pinkie Pie's cutie mark I'm attaching 3 balls to mimic the balloons on her cutie mark.

I have gotten bitten by the Pony bug! I was a HUGE fan back in the day and I really like what they have done with it now. If I get the wig in time I will be Fluttershy, probably on Sunday until I have to go to skit rehearsals and stuff.

I don't really have plans on making a tail, but InkyDoo the clip on ponytail(lol) is a good idea.

Sorry for resurrecting this old forum, but I'm in the same boat. I want to find a group to cosplay with hopefully for Otakon 2013 as Grand Galloping Gala ponies... None of my real-life friends like ponies. :|